diff options
Diffstat (limited to 'usr.sbin/bsdconfig/share/common.subr')
| -rw-r--r-- | usr.sbin/bsdconfig/share/common.subr | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/usr.sbin/bsdconfig/share/common.subr b/usr.sbin/bsdconfig/share/common.subr index 071325c..05531aa 100644 --- a/usr.sbin/bsdconfig/share/common.subr +++ b/usr.sbin/bsdconfig/share/common.subr @@ -64,10 +64,16 @@ export UNAME_R="$(uname -r)" # Release Level (i.e. X.Y-RELEASE) ############################################################ FUNCTIONS +# f_dprintf $fmt [ $opts ... ] # # Sensible debug function. Override in ~/.bsdconfigrc if desired. # See /usr/share/examples/bsdconfig/bsdconfigrc for example. # +# If $debug is set and non-NULL, prints DEBUG info using printf(1) syntax: +# + To $debugFile, if set and non-NULL +# + To standard output if $debugFile is either NULL or unset +# + To both if $debugFile begins with a single plus-sign (`+') +# f_dprintf() { [ "$debug" ] || return $SUCCESS @@ -108,6 +114,30 @@ f_have() f_quietly type "$@" } +# f_getvar $var_to_get [$var_to_set] +# +# Utility function designed to go along with the already-builtin setvar. +# Allows clean variable name indirection without forking or sub-shells. +# +# Returns error status if the requested variable ($var_to_get) is not set. +# +# If $var_to_set is missing or NULL, the value of $var_to_get is printed to +# standard output for capturing in a sub-shell (which is less-recommended +# because of performance degredation; for example, when called in a loop). +# +f_getvar() +{ + local var_to_get="$1" var_to_set="$2" + [ "$var_to_set" ] || local value + eval ${var_to_set:-value}=\"\${$var_to_get}\" + eval [ \"\${$var_to_get+set}\" ] + local retval=$? + eval f_dprintf '"f_getvar: var=[%s] value=[%s] r=%u"' \ + \"\$var_to_get\" \"\$${var_to_set:-value}\" \$retval + [ "$var_to_set" ] || { [ "$value" ] && echo "$value"; } + return $retval +} + # f_die [ $status [ $fmt [ $opts ... ]]] # # Abruptly terminate due to an error optionally displaying a message in a |
